Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach tuoc » sach duoc, sach nuoc
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
hanh tai » hang tai, han tai, hinh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu vien bach tuoc va ((hanh tai) or (thanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu vien bach tuoc va ((hanh tai) OR (thanh tai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu vien bach tuoc va ((hanh tai) or (thanh tai)) cua triet*.